Profiling-machine



6 SheetsSheet 1. G. E. DAVIS 8a 0, L. GROHMANN.

(No Model.)

PROFILING MACHINE.

No. 560,347. Patented May 19, 1896.

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O-UFHO.WASHING7DN D C 6 Sheets-Sheet 2. G. E. DAVIS & C. L. GROHMANN;PROPILING MACHINE. No. 560,347. Patented May 19, 1896.

(No Model.)

(No Model.) 6 Sheets-Sheet 5.

O. E. DAVIS 8a 0. L. GROHMANN.

. PROFILING MACHINE. No. 560,347. Patented May 1 mill IIlII III1 1 v 4(No Model.) I 6 Sheets-Sheet 6.

0'. E. DAVIS & 0. L. GROHMANN. PROFILING MACHINE.

No. 560,347. v Patented May19, 1896.

a i a NITE TATES:

CHARLES E. DAVIS AND CARL L. GROIIMANN, OF CHICAGO, ILLINOIS.

PROFILylNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 560,347, dated May 19,1896. Application filed October 20,1894. Serial No. 526,513. (No model.)

To all whom, it ntay concern.-

Be itknown that we, CHARLES E. DAVIS and CARL L. GROHMANN, of Chicago,in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Profiling-ll'lachines, of which the followingis a full, clear, and exact description,reference being had to theaccompanying drawings, forming a part of this specification, in whichcorresponding letters of reference in the differ ent figures indicatelike parts.

The object of our invention is to provide a profiling-machine whichshall be so constructed as to permit of the automatic shaping by meansof a suitable cutter or tool of an indefinite variety of formsconforming in contour, respectively, with formers of varying shape. Tothis end our purpose, among other things, is to provide aprofiling-machine in which the strain of the driving and feed beltsshall be removed from the spindle in order to permit the attainment ofhigh speed in the latter and the consequent satisfactory use of smallcutters; further, to provide a novel feed mechanism for the machine,whereby the lineal feed of the work is rendered uniform in speedregardless of the distance of the tool at any given time from the axisof the face plate upon which the work is held; further, to enable aformer to be employed which is larger than the size of the article to beformed. Again, we desire by means of novel and simple adjustments to cutcams or other forms of a steeper pitch than has heretofore been in thesize thereof by means of a tapering former-pin, thus insuring exact workand enabling all of the special forms to be made by the use of plaincutters in lieu of a variety of cutters of special and costly shapes.Moreover, it is our purpose to provide certain novel devices'withrelation to the feeding mechanism whereby it may be controlled either byhand or power.

. To these ends our invention consists in the combination of elementshereinafter more particularly described, and definitely pointed out inthe claims.

In the drawings, Figure 1 is a front elevation of our improved machine.Fig. 2 is the side view thereof. Fig. 3 is an enlarged view in detail ofa friction-wheel, being a modified construction. Fig. 4 is a centrallongitudinal sectional view in detail of the spindlehead. Fig. 5 isasectional view thereof, taken upon the line 5, Fig. 1, Viewed in thedirection of the arrows there shown. Fig. 6 is a sectional view takenupon the line 6, Fig. 4. Fig. 7 is a side view of the machine, takenfrom an opposite direction from that shown in Fig. 2.

cal sectional view of the friction-Wheel shown in Fig. 9. Fig. 11 is anend view of said friction-wheel as seen from the front of the machine.Fig. 12 is a central horizontal sectional view of said frietion wheel.Fig. 13 is a detail view of the tilting arm for tilting thefriction-wheel. Fig. 14 is a detail view of the ring for connecting thetilting arm with the wheel. Fig. 15 is a sectional view taken upon theline 15, Fig. 14. Fig. 16 is a vertical sectional View upon the line 16,Fig. 19. Fig. 17 is a longitudinal sectional view in detail of theoscillating faceplate-holding arm and the shafts and gearing mountedtherein. Fig. 18 is a face view in detail of the face-plate, showingwork of an irregular form clamped therein. Fig. 19 is a detail view ofthe oscillating arm, looking toward the face-plate, said arm beingdetached from the horizontal portion by which it is supported. Fig. 20is an enlarged vertical sectional viewin detail of the handfeeding-crank and its connections. Fig. 21 is an enlarged longitudinalsectional view of the former-pin head. Fig. 22 is a like view showing amodification thereof. Fig. 23 is a front View of the face-plate, showingthe clamping device for holding the work. Figs. 24, 26, 2S, and are likeface views; and Figs. 25, 27, 29, and 31 are edge views of a face-plate,showing clamping devices with varying kinds of work therein.

Referring to the drawings, a represents the frame of our improvedmachine, which con- Fig. 8 is plan view in detail of the former-pinhead, together with a sectional sists of an upright of cast metal ofsuch proportions as to render it thoroughly rigid. Attached to the topof the frame Cb is sliding head 1), Figs. 1, 2, at, and 5, which isconnected with the frame a by means of the dovetailed block if, arrangedin a suitable guideway in said frame, as clearly shown in Fig. 5. Boltsb one of which is shown in said last-named figure, serve to attach theblock b to hollow adjusting screw-bolts b tapped into the head I), bywhich the wear in the slide may be taken up when desired. Lugsc c areformed upon the block I)", through which is loosely passed afeeding-screw cl. (Indicated in dotted lines in Fig. 1 and shown inFigs. 2 and 5.) A nut (1' (indicated in dotted lines in Fig. 1) isformed upon the screw d and interposed between the lugs c c. The screwdis held from longitudinal movement in the frame, as indicated, so thatwhen turned by means of a hand-wheel d thereon the head I) may be.

caused to slide longitudinally for the purpose of adjusting the,cutting-tool to the work or of removing it therefrom, as hereinafterstated.

Mounted in suitable bearings in the head I), as clearly shown in Fig. 4,is a hollow spindie 6, to which is keyed a disk 6', Figs. 4 and 5, towhich is, attached by means of a screw 6 a square block e A stationarysleeve 6 through which the hollow spindle is passed, is rigidly attachedto a bracket or arm b of the head I). A secondary sleeve 6 is looselymounted upon thesleeve 6 upon which sleeve is in. turn loosely mountedthe hub of a main driving-pulley f, of which said sleeve forms thehearing. A slot 6 is formed in the web of said pulley, into which isloosely inserted the block 6", thus indirectly connecting the pulley fwith the hollow spindle, so that as the former is rotated it will causethe rotation of the latter. It will be observed that this. constructionenables the hollow spindle to be entirely relieved from the strain ofthe belt, and hence it may be rotated at a high rate of speed withoutdanger of heating. Moreover, it permits the use of a small andinexpensive cutter where otherwise a large one would need to be employedto accomplish a satisfactory amount of work.

Abracket g, provided with a sleeve integral therewith, is rigidlyattached to the frame, and serves as a support for a secondary pulley g,which is attached to a ring g by means of a screw 9 which is in turnsplined to the hollow. spindle. Thus the outer end of the spindleissupported while the strain of the pulley g is entirely removedtherefrom.

A draw-in spindle g is placed within the hollow spindle e and isprovided with a handwheel g3, by which it is operated. The other end istapped into the usual cone-chuck, as

shown, for the purpose of holding the tool 9 The pulley g is connectedby meansof a belt g Figs. 1 and 2, to a cone-pulley g, mounted upon a.bearing attached to the frame, which pulley is connected to a secondarycone-pulley h by means of a belt it, said pulley being mounted upon astud 72 rigidly attached to the frame. A spiral spring 7t is interposedbetween the pulley and frame for the purpose hereinafter stated. Rigidlyattached to the pulley 72' is a friction-disk i, which is intended torotate continuously and is designed to antomatically regulate the feed,as hereinafter specified.

We will first describe our improved means for giving an oscillatorymovement to the face-plate,wherebythe position of the cuttin gtool isaccommodated to the contour of the work, after which we will describeour inproved automatic feeding device.

Mounted in horizontal bearings j, Fig. 1., is a hollow rock-shaft 7c.Shown in section in Fig. 17. Said hollow shaft is provided with a flange7t, to which is detaehably secured by means of a like flange boltedthereto, a hollow upright arm Z, upon the upper end of which is formed ahead i, within which is mounted a revolublc face-plate m. A hub m, Fig.17, is preferably formed upon the faceplate, which hub is secured in asuitable bearing in the head or upper part of the arm Z. A ring m fittedwithin an offset in the face plate, as clearly shown in Fig. 17, isbolted to a flange upon the head and serves to re tain the face-plate inposition while permit ting it to be rotated.

Formed upon the periphery of the faceplate within the head aregear-teeth, as shown adapted to engage with a worm m, Fig. 15), upon ashaft m, located within the arm Z. The upper end of the shaft on issecured in a bearing m Figs. 10 and 19, which is renderedlaterallyadjustable by means of the set-screw m and adj listing-plate mwhich enables any desired adjustment to be made. The lower end of theshaft 177." is supported within a bearin g 772 which is rigidlyconnected, as shown in Fig. 17, with a similar bearing 76*, detachablysecured within the hollow rock-shaft 71'. The bearing 71: together witha suitable bearing 76*, supported in the opposite end of the rock-shaft,serves to support a shaft it within the rock-shaft 7c, the former ofwhich is connected with the shaft 712 by means of fourpeculiarly-arranged beveled gears 7.1", a, a, and m, Figs. 7, 17, 19,and 20. The gear n is mounted upon a short hollow shaft of, Fig. 20,which is secured within a bearing or at the base of the arm Z, thusenabling the shaft to extend outwardly toward the front of the machine.Keyedrigidly to the outer end of the shaft n is a hand-wheel n Figs. 1,2, 7, 1!), and 20, by which the shaft on" may be. operated by hand, whendesired, through the gear 12. WVithin the hollow shaft n which forms abearing therefor, is placed a shaft a, to which the gear 01 is attached.Splined to the outer end of the shaft 01 is a hub 12, which extendsbeyond said outer end, as shown in Fig. 20, and is adapted to be movedlongitudin ally thereon,while required to rotate therewith. A plate a"is rigidly attached to the outer end of the hub. A screw it having ashoulder 01 thereon, is tapped into the shaft 7"? and is provided with ahand-wheel n which, when turned, serves to impart-a 1ongitudinalmovement to the hub. The hub is provided with a cone-shaped flange nadapted to fit within a corresponding recess formed in the hub of thehand-wheel n. Thus by means of the hand-wheel n the cone-shaped rim nmay be forced into said recess, thereby clutching the hub n andhand-wheel n together by frictional contact and causing the shafts 02 71to rotate as one. The shaft 10 (see Figs. 7 and 17) is connected bymeans of intermediate mechanism, hereinafter described, with a source ofpower for the purpose of rotating the face-plate. Vhen, therefore, thefriction-clutch just described is set, as shown in Fig. 20, the gearmeshing into the gear 71, drives the latter, and with it the gear 11,,which in turnengages with the gear m thus driving the shaft m andimparting motion to the face-plate m through the worm m Upon reversingthe hand-wheel n and loosening the friction-clutch the gears 70 71continue to rotate, but the shaft 12 remains stationary, and hence nomotion is imparted to the face-plate; but should it be desirable to feedthe work by hand this may be accomplished by turning the hand-wheel nThus it will be seen that the machine may be adj usted at will so thatthe face-plate may be rotated by power automatically or by hand bymerely clutching or unclutching the shafts n n".

Attached to the left-hand end of the shaft k Figs. 2 and 17, is agear-wheel 0 in engagement with a worm 0 upon a shaft 0 One end of thelatter is supported in bearings formed in a casing 0 which covers thegear 0. The other end of said shaft is supported in a bearing 0, Fig. 2,upon the outer end of the stud 71. (shown in Fig. 1 and indicated indotted lines in Fig. 2,) said stud extending through a central openingin the frictiondisk t'.

Loosely mounted upon the shaft 0 is a sleeve 0 Figs. 9, 10, 11, and 12,which is splined into the groove 0, so as to permit a longitudinalmovement upon said shaft while rotating therewith. Upon one end of saidsleeve is formed a ball 0 which serves as a bearing for a wheel 19. Pins0 0 Fig. 12, are projected from the body of the wheel into grooves 0" insuch manner as to permit the wheel to tilt laterally upon its axis whilecausing the rotation of the sleeve 0 and shaft 0 The body of the wheel13 is made in two parts bolted together, as indicated, to enable it tobe placed upon the ball. sections is preferably secured a ring 19 ofrubber or other suitable material, having a friction-surface adapted toengage in frictional contact with the surface of the frictionwheel 1'.Placed loosely within a groove or recess formed between two sections ofthe wheel 1) is a ring p, Figs. 9, 10, 11, 12, 14,

Between the and 15, which is cut away, as shown at 19 and notched at thesides, as shown at 19 19 A collar 10 is loosely mounted upon the sleeve0 said collar having an arm 19 with a notch 19 formed upon its underside, which is in operative connection with the cut-away portion of thering 19. Trunnions 19 p are formed upon the collar and are connected bymeans of links 10 19 to the respective branches ff of an arm g, which isrigidly attached to the rock-shaft f Figs. 1 and 2, sustained in abearing within a hollow stud f which is rigidly attached to the frame.The inner end of the shaft f has an arm f (indicated in dotted lines,)which is connected by means of a link f to an arm f, which is rigidlyattached to the rock-shaft 7c. Bythis means the oscillation of therock-shaft is communicated to the sleeve p thereby actuating the latterand moving the friction-wheel 19 either toward or away from the centerof the disk 11, according to the direction of the movement of therockshaft. In order to save power and prevent undue wear of thefriction-surfaces upon the wheel 19 and disk 2', which would occur asaresult of forcibly sliding the former upon the latter, we provide themeans described for tilting the wheel 19 obliquely to the shaft 0 whichcauses it to roll to or from the center, according to the direction inwhich it is tilted. The relative distance of the wheel from the centerof the disk 2' governs its speed, which varies in exact proportion tosaid distance, and hence varies the speed of the face-plate m throughthe shafts 0 70 m. The object of this devicewill be more clearlyunderstood in connection with the construction and operation of theformer with reference to the cutting-tool, which will now be described.

Secured in the hollow hub m of the faceplate m is a tapered pin 0", tothe outer end of which is attached by means of a suitable nut a former.9, Figs. 1, 7, and 17. A bracket t, Figs. 1 and 7, is formed upon theframe, which is provided with a dovetailed groove, in which is fitted anarm t, adapted to slide thereon. A screw 6 having a hand-wheel i istapped into a depending lug secured to the arm t. By turning thehand-wheel the arm may be moved backward or forward to any desiredposition. I

Secured in the upper end of the arm 15 by means of a handtightening-screw 25, Figs. 1, 7, 8, 21, and 22, is a former-pin holder iwhich may be adjusted longitudinally by means of a screw-thread thereon,as shown, and is preferably made hollow, so as to receive a former-pin ttherein. The formerpin is adjusted so as to engage with the former,whatever its character or contour may be. If a cam, as shown in Figs. '7and 8, the end of the former-pin is placed in the groove 8 thereof, inwhich case we prefer to employ a straight former-pin, as shown in Fig.8. In case a different former is used upon workrequiring profile-cuttingonly, we prefer to employ a tapered former-pin, as shown in Figs.

21 and 22. In such case the former-pinholder '6 which is tapped into thehead of the part 2, may be adjusted longitudinally, so as to permit thetapered portion of the pin to bear upon the former in such a way as tocompensate for the wear of the cutter. Thus it is obvious that not onlya cutter of very small diameter may be employed, but it may be permittedto wear indefinitely and yet insure accurate work. A great advantage ofthis construction which permits the use of a small cutter is that itenables every variety of work to be speedily, accurately, and cheaplydone that has heretofore required the use of special and expensivecutters. The means for adjusting and aiding in the manipulation of theparts referred to are the followin g: An arm t Figs. 2 and 7 is formedupon the arm i, upon which is mounted a sheave i over which is trained acord it, having a weight it thereon. An eccentric hand-clamp 1L (bettershown in Fig. 2) enables the cord to be clamped atwill. The end of thecord is attached to the head Z of the arm Z, and the constant tendencyof the weight is to draw the arm forward and hold the former against theformer-pin.

The work n, varying indefinitely in form, as indicated in Figs. 18 and23 to 31, inclusive, is clamped upon the face-plate m, and a former .5'of the desired contour is attached to the oscillating head in the mannerdescribed. The former-pin is adjusted in contact with the former and thecord i unclutched, so as to permit the Weight to act and hold the formeragainst the former-pin as the former is rotated. The cutter or tool g isthen placed in the chuck and adjusted to the work by turning thehand-wheel d Powerbeing applied to the machine, the friction-wheel i isrotated in the manner described, and being pressed by the action of thespring 7? against the frietion-whcel p the motion of the latter isimparted in the manner specified to the face plate. Assuming that thework to be done is the cutting of a groove in a cam r, Fig. 1., thecontour of which is like that shown at s, Fig. 7, as the face-plate isrotated the arm Z is oscillated to conform to the variations in theformer. Assuming the former to be in the position shown in Fig. 7, thefriction-wheel 1), Fig. 2, as a result of the position of the rockshaft,will be very near the center of the disk *5, and consequently will berotated at a minimum rate of speed, thereby rotating the faceplateslowly, so as to feed the work to the cutter g at no greater speed thanif the cutter were nearer to the axis of the cam. As the face-plate isfurther rotated so as to bring the former-pin in that part of the groovenearest to the center of the former, the wheel 19 is moved farther fromthe center of the disk 1' and is thereby caused to rotate at aproportionately higher rate of speed, thus rotating the face-platefaster when the cutter is nearest to the center. By this means thelineal feed to the cutter is always automatically lllttlllbtlllGtl at auniform rate, regardless of the shape of the former, the speed ofrotation of the face-plate being always in proportion to the distance ofthe former-pin from the center of the former.

In lieu of the tilting wheel, which automatically accommodates itself tothe desired direction of movement of the sleeve 0" upon the shaft 0 anordinary wheel may be used, as shown in Fig. 3; but the power requiredto shift it would be much greater.

Aside from the advantage incident to an automatic and uniform linealfeed, which is the direct result of the employment of the rockshaft 76and the oscillating face-plate, this construction enables a much largerformer to be employed and allows profile work to be done of a muchsteeper pitch than can be done upon ordinary machines, while thefriction incident to the work is greatly decreased. Moreover, theautomatic feed described onables the tool to cut with greater smoothnessthan if the feed were varied, as it necessarily would be when controlledby hand.

It is obvious that the conditions described may be reversed and that thecutting-tool and former-pin instead of being stationary may be made tooscillate in harmony with the contour of the former by which it may becontrolled, and that the work and former may be placed upon thestationary axis and rotated to conform in its lineal feed to the contourof the former without departing from the principle involved in ourinvention; but we prefer the construction hereinbefore set forth.

Having thus described our invention, we claim- 1. The combination in aprofiling-machine of an oscillating arm, a revoluble former mountedthereon, for determining the contour of the Work to be formed anadjustable formerpin, means for securing the same in a stationaryposition, a work-holdin g face-plate in operative connection with saidformer, a cutting-tool, means for feeding the work thereto, a source ofpower for actuating said former and cutting-tool, and means such as aweighted cord and pulley for holding the former in engagement with theformer-pin with a yielding pressure, whereby all play is taken up andthe exact contour of the former is followed in the work, substantiallyas described.

2. In a profiling-machine, the combination of an oscillating arm mountedupon a rockshaft, a revoluble former mounted upon said arm, means forholding said former in operative contact with a stationary pin, arevoluble face-plate, a cutting-tool, a source of power in operativeconnection with said face-plate and cutting-tool, an automatic feedingdevice and means in operative connection with said rock-shaft wherebythe lineal feed may be controlled by the relative position of therockshaft as it is caused to oscillate by the former, substantially asdescribed.

3. In aprofiling-macl1ine, the combination of an oscillatory arm mountedupon a rockshaft, a revoluble former mounted upon said arm, means forholding said former in operative contact with a stationary pin, arevoluble face-plate, a cutting-tool, a source of power in operativeconnection with said face-plate and cutting-tool, a friction-disk, alaterallymovable friction-wheel connected with the feeding mechanism todrive the same, and means, in operative connection with said rockshaftfor moving said friction-wheel away from or toward the center of saidfrictiondisk as said arm is oscillated by the former, substantially asdescribed.

4. In a profiling-machine, the combination of an oscillatory arm mountedupon a rockshaft, a revoluble former mounted upon said arm, means forholding said former in operative contact with a stationary pin, arevoluble faceplate, a cutting-tool, a source of power in operativeconnection with said face-plate and cutting-tool, a friction-disk, alaterallytilting friction-wheel connected by means of suitable shaftingand gears with the faceplate and means, in operative connection withsaid rock-shaft for laterally tilting said friction-wheel in harmonywith the movement of said rock-shaft, substantially as described.

5. In a profiling-machine, the combination of a revoluble former mountedupon an oscillatory arm, a revoluble face-plate a cuttingtool, a sourceof power in operative connection with said face-plate and cutting-tool,a feeding device, a former-pin having a tapered end adapted to bebrought into engagement with the former, means for adjusting saidformer-pin longitudinally, means for also adjusting the same at varyingdistances from the axis of the former and means for holding said formerin operative contact with said former-pin, substantially as described.

6. The combination in a profiling-machine, of a revoluble former, aformer-pin having a tapering end adapted to engage with the former, andmeans for adjusting said formerpin longitudinally, whereby the wear ofthe tool may be compensated for, substantially as described.

'7. The combination in a profiling-machine of a revoluble former mountedupon a rockshaft, a work-holding face-plate in operative connectiontherewith, feeding mechanism, a

friction-disk in operative connection with the driving-power foractuating the feeding mechanism, a friction-wheel adapted to be tiltedobliquely to its axis and in frictional contact with said disk andinterposed means in operative connection with said rock-shaft fortilting said friction-wheel in harmony with the oscillation of theface-plate, substantially as described.

8. The combination with the friction-diski of the laterally-movabletilting wheel 19 in operative connection with the feed mechanism,substantially as described.

9. The combination with a revoluble oscillatory former, of the shaft 0in operative connection with the feed mechanism, disk 2', tilting wheel19, lever q and means for automatically oscillating said lever inharmony with the oscillation of the former, substantially as described.

10. In a profiling-machine, the combination of an oscillatory arm, arevoluble former mounted thereon for determining the contour of the workto be formed, a former-pin, means for securing the same in a stationaryposition, means for holding the former in engagement therewith, acutting-tool, means for feeding the work thereto, a source of power foractuatin g said former and cutting-tool, and means for receiving thebelt pull, whereby the cutting-tool may be relieved from friction,substantially as described.

11. In a profilin g-machine, the combination of a spindle for holdingthe cutting-tool, a driving-pulley mounted upon a bearing independent ofthe spindle, and a disk splined or otherwise secured to thespindle andconnected with said pulley by means of a sliding or yielding connection,whereby rotary motion may be imparted to the disk while said disk iswholly relieved from the belt strain, substantially as described.

In testimony whereof we have signed this specification, in the presenceof two subscribing witnesses, this 13th day of July, 1894.

- CHARLES E. DAVIS.

CARL L. GROHMANN. \Vitnesses D. H. FLETCHER, W. H. OHAMBERLIN.

